Multiterm Converter 2021 Parsing Error

I am trying to convert a .tbx file to create a termbase. 

The .tbx file is from the Irish terminological database, available here https://www.tearma.ie/ioslodail/ 

I am getting this error:


I can see other parsing errors on the forum, but nothing that is a help re Multiterm Converter 2021.

Can anybody advise?

TIA, Darán